Patents Assigned to Dialogic (US) Inc.
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Patent number: 10298124Abstract: A power converter to convert power between a first converter voltage at a first converter port and a second converter voltage at a second converter port is presented. It contains a first capacitor network, an inductor and a first switching matrix to arrange the first capacitor network and the inductor within different states. One of the states is a bypass state enabling current to flow from the first converter port or from ground through the first capacitor network to the second converter port without going through the inductor. Another state is an inductor state enabling current to flow from the first converter port or from ground through the inductor to the second converter port. The power converter also includes a control unit to control the first switching matrix repeatedly in a recurrent sequence of the different states.Type: GrantFiled: August 31, 2017Date of Patent: May 21, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Holger Petersen, Jiri Ledr
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Patent number: 10298210Abstract: An apparatus and method for a temperature and calibration utilizing resonant frequency peaks in an oscillator. A circuit providing resonant peaks for utilization for temperature measurements comprising a resonator device for providing an oscillating source, a variable gain-bandwidth amplifier in parallel with the crystal/resonator for providing modulation of the gain and/or bandwidth driving the crystal/resonator, and control of resonant peaks for selection for oscillation, a first capacitor electrically coupled to the parallel combination of the input of the variable gain-bandwidth amplifier, and the resonator device for providing charge storage for oscillation, and a second capacitor electrically coupled to parallel combination of the output of the variable gain-bandwidth amplifier, and the resonator device for providing charge storage for oscillation.Type: GrantFiled: December 11, 2017Date of Patent: May 21, 2019Assignee: Dialog Semiconductor (UK) LimitedInventor: Adam Malpass
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Patent number: 10298014Abstract: A solid state driver circuit that is compatible with either a low frequency mains or magnetic ballast supply or a high frequency electronic ballast input is presented. An input detection circuit detects the frequency of the supply and selectively adjusts the drive circuit to act as a linear regulator when an electronic ballast is detected, or as a switched mode regulator when mains or a magnetic ballast is detected. There is also provided a method of driving a solid state lamp. The method has a step which receives an input power supply. The method also has an enabling operation of a switching regulator or the shorting of a switching regulator according to the frequency of the input power supply.Type: GrantFiled: November 3, 2017Date of Patent: May 21, 2019Assignees: Dialog Semiconductor (UK) Limited, Dialog Semiconductor, Inc.Inventors: Ye Hu, Baorong Chen, Liang Yan
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Patent number: 10298112Abstract: A circuit for driving a power switch is presented. The circuit includes a first power switch coupled to a second power switch via a switching node and a driver coupled to the first power switch, where the driver contains an energy storing element coupled to the switching node. The circuit also contains a sensor to sense an electrical parameter of the driver and a charger coupled to the sensor. The charger provides a charge current to charge the energy storage element, and to control the charge current based on the electrical parameter. In particular, a circuit for driving a power switch based on a III/V semiconductor is presented. In addition, a method of powering a power switch driver is presented. The method includes sensing an electrical parameter of the driver and adjusting a current to charge the energy storing element based on the electrical parameter.Type: GrantFiled: September 29, 2017Date of Patent: May 21, 2019Assignees: Dialog Semiconductor, Inc., Dialog Semiconductor (UK) LimitedInventors: Horst Knoedgen, Christoph Nagl, Nebojsa Jelaca, Kun Yang, Jung Woo Choi
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Patent number: 10291117Abstract: A multi-phase power converter is described, which is configured to convert power between an input port and an output port. The multi-phase power converter comprises a basic switched converter comprising a basic inductor, wherein the basic switched converter is configured to convert power between the input port and the output port. Furthermore, the multi-phase power converter comprises an auxiliary switched converter comprising an auxiliary inductor, wherein the auxiliary switched converter is configured to convert power between the input port and an auxiliary port. In addition, the multi-phase power converter comprises a set of configuration switches configured to couple the auxiliary port to the output port, or to arrange the auxiliary inductor and the basic inductor in series.Type: GrantFiled: April 15, 2016Date of Patent: May 14, 2019Assignee: Dialog Semiconductor (UK) LimitedInventor: Holger Petersen
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Patent number: 10292226Abstract: A direct AC LED lighting device is provided with a low-pass filter for filtering a threshold time in which a post diode bridge voltage exceeds an LED threshold voltage during a current AC half cycle for the post diode bridge voltage.Type: GrantFiled: April 6, 2018Date of Patent: May 14, 2019Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Nan Shi, Haiju Li
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Patent number: 10281505Abstract: A voltage sensing circuit for a switching power converter includes a comparator having a comparator input stage that processes a voltage from a main DAC and a current from a tracking DAC.Type: GrantFiled: January 13, 2017Date of Patent: May 7, 2019Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Qiu Sha, Andrey Malinin, Qifeng Shi, Mingsheng Peng
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Patent number: 10284078Abstract: A method and apparatus for limiting or preventing electromagnetic interferences in a switching converter are presented. In particular, a power circuit provided with an active electromagnetic interference filter is presented. There is an electromagnetic interference EMI reduction circuit for use with a switching converter. This EMI reduction circuit has a current source and is adapted to regulate a voltage across the current source to provide a current having a constant average value. The switching converter is adapted to provide a converter current, and the current source constant average value may be substantially equal to an average value of the converter current. The circuit has a variable resistance; and an adjuster adapted to adjust the variable resistance based on the converter current. The adjuster may have a comparator, which is adapted to compare a voltage value at a terminal of a transistor switch, and a reference value.Type: GrantFiled: December 13, 2017Date of Patent: May 7, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca
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Patent number: 10256720Abstract: Circuits and methods to achieve a hysteretic buck-boost converter system, separating buck and boost pulses based on monitoring a difference between the output voltage of the buck-boost converter and a reference voltage (error voltage) or alternatively based on monitoring additionally coil current or load current or both currents have been disclosed. The performance of the buck-boost converter can be further improved by using an optional output voltage change block monitoring if the output voltage rises or falls. The buck-boost converter disclosed has a very simple topology without a modulator block, which is regulating the duty cycle and without frequency compensation.Type: GrantFiled: March 31, 2017Date of Patent: April 9, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Kemal Ozanoglu, Guillaume de Cremoux, Pier Cavallini, Martin Faerber
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Patent number: 10248589Abstract: An integrated circuit coupled to an external serial bus is presented. A method for prefetching data from an external serial bus is presented. The integrated circuit comprises a serial interface, a data cache, and a prefetch control unit. The serial interface detects a data address on the serial bus and reads data elements from data storage units. The data storage units may be internal or external to the integrated circuit. The data cache is coupled to the serial interface via an internal bus. The prefetch control unit instructs the serial interface to prefetch a data element associated with the data address by reading the data element from a target data storage unit associated with the data address. The data element and the data address are written to the data cache. When a read request is detected, the data element can be quickly accessed from the data cache.Type: GrantFiled: August 12, 2016Date of Patent: April 2, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Olivier Girard, Joao Paulo Trierveiler Martins, Daniele Giorgetti, Philip Todd
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Patent number: 10250128Abstract: A transient response circuit provides faster transient response time of an electronic device so that less overshoot or undershoot of an output signal of the electronic device occurs when a large load and/or line transient signal is present at an input and/or output terminal of the electronic device. The transient response circuit has a transient detection circuit and an assist circuit. The transient detection circuit monitors a feedback signal applied to an input terminal of the control stage, and generates transient detection signals indicating that detection of a large load and/or line transient signal has occurred. The assist circuit communicates receives the transient detection signal and charges or discharges a loop filter capacitor of the control stage for causing the control stage to regulate the output signal to decrease overshoot or undershoot upon receipt of the transient detection signal.Type: GrantFiled: March 9, 2016Date of Patent: April 2, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Naoyuki Unno, Soichiro Ohyama, Hidenori Kobayashi
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Patent number: 10250210Abstract: An amplifier comprising a differential amplifier configured to be provide a comparator function, and a gain trimming circuit is electrically configured to provide gain trimming using a T-network comprising a varistor element. In addition, a method of trimming the gain of a differential amplifier, comprising the steps of a first step, (a) providing the differential amplifier comprising resistors in both of its paths, a second step, (b) providing a varistor in a T-network between both said paths; and lastly, a third step, (c) trimming the gain of the differential amplifier by adjusting the varistor's resistance.Type: GrantFiled: July 5, 2016Date of Patent: April 2, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Zakaria Mengad, Steven Collins, Vladislav Vasilev
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Patent number: 10250046Abstract: An apparatus and method for blocking electromagnetic interference, EMI is presented. In particular, the present invention relates to a switched mode power supply provided with an electromagnetic interference protection circuit with low power dissipation. There is provided an adiabatically-switched electromagnetic interference protection circuit. The protection circuit contains a first charge storage element and a second charge storage element. A switching regulator operates with a switching cycle having an on-time and an off-time; and the control signal is arranged to cause a transition between the first mode and the second mode to start during the off-time of a switching cycle of the switching regulator.Type: GrantFiled: August 30, 2016Date of Patent: April 2, 2019Assignee: Dialog Semiconductor, Inc.Inventor: John Kesterson
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Patent number: 10250921Abstract: Systems, methods, and techniques for providing video forwarding in real-time video applications involving multiple devices. The techniques can be employed in WebRTC videoconferences, taking into account the heterogeneous natures of device display resolutions and networks in which the devices operate. The techniques employ a media server including an SFU having an adaptive video transcoder. The media server determines whether a benefit to QoE is achieved by performing video transcoding on large video streams produced by the respective devices. If a heterogeneity value of available network bandwidths is greater than a predetermined value and CPU/memory resources are available, then the adaptive video transcoder beneficially performs transcoding on the large video streams to produce corresponding small video streams, which are selectively forwarded to devices having low available network bandwidths.Type: GrantFiled: December 22, 2017Date of Patent: April 2, 2019Assignee: Dialogic CorporationInventors: Kyeong Ho Yang, Antony R. Martin
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Patent number: 10249769Abstract: An object of the disclosure is to take a CMOS varactor structure (NMOS in N-well or PMOS in P-well) and turn it in to a three terminal on-chip tuneable diffusion resistor. The diffusion resistor can be made with an n+ diffusion inside the p-substrate, or with a p+ diffusion inside an N-well that lies within the p-substrate. The resistor can be implemented in any existing CMOS or BICMOS silicon technology, without using additional masks. The resistor can be also implemented in a technology with FINFETs.Type: GrantFiled: December 13, 2017Date of Patent: April 2, 2019Assignee: Dialog Semiconductor, Inc.Inventor: Douglas Daley
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Patent number: 10248150Abstract: An object of the disclosure is to provide a slope enhancement circuit, comprising an amplifier and a specific arrangement of capacitors and switches, further comprising a current digital to analog converter (IDAC), in a switched regulated current mirror. A method of sample and hold exploits the transient dynamics of the switched current mirror, to enhance the output current slope during PWM operation. A further object of the disclosure is to provide a low power, high speed switching type of regulated current mirror architecture. Still further, another object of the disclosure is to provide quick response to a sudden demand in current with a high degree of accuracy. Still further, another object of the disclosure is to provide a significant savings in circuit area.Type: GrantFiled: July 18, 2017Date of Patent: April 2, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Shyam Narayanan, Fulvio Schiappelli
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Patent number: 10248145Abstract: A voltage regulator to provide a load current at an output node is presented. The voltage regulator has a pass transistor for providing the load current at the output node from an input node. The voltage regulator contains a driver stage to set a gate voltage at a gate of the pass transistor based on a drive voltage at a gate of a drive transistor. The voltage regulator has voltage regulation means to set the drive voltage in dependence of an indication of the output voltage at the output node and in dependence of a reference voltage for the output voltage. The driver stage has the drive transistor and a diode transistor, wherein the diode transistor forms a current mirror with the pass transistor. The driver stage has a current amplifier amplifies a drive current through the drive transistor to provide an amplified current through the diode transistor.Type: GrantFiled: February 21, 2018Date of Patent: April 2, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Dan Ciomaga, Mihail Jefremow, Stephan Drebinger, Fabio Rigoni
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Patent number: 10243468Abstract: A switching power converter provides regulated voltage to a load. The switching power converter comprises a transformer including a primary winding coupled to an input voltage and a secondary winding coupled to an output of the switching power converter. The switching power converter further comprises a power switch coupled to the primary winding and a rectifier coupled to the secondary winding. Current is generated in the primary winding responsive to the power switch being turned on and not generated responsive to the power switch being turned off. A detection circuit measures a voltage across the rectifier. If the detection circuit detects a decrease in the voltage across the rectifier outside of a blanking period, the detection circuit generates a current pulse in the secondary winding of the transformer.Type: GrantFiled: April 4, 2017Date of Patent: March 26, 2019Assignee: Dialog Semiconductor Inc.Inventors: Pengju Kong, Yong Li
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Patent number: 10243451Abstract: A circuit and method for regulating an internal power supply of a switching converter is presented. A switching converter with a depletion mode power switch coupled to an enhancement mode power switch via a switching node and an energy storing element coupled to the depletion mode power switch is provided. The energy storing element may be adapted to provide energy to the switching converter. For instance, the energy storing element may be a capacitor. Optionally, the switching converter may comprise an inductor coupled to the depletion mode transistor, the inductor being adapted to provide an inductor current.Type: GrantFiled: March 21, 2018Date of Patent: March 26, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca
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Patent number: 10241551Abstract: A distributed power management system comprising at least two power management integrated circuits PMICs is presented. A master power management integrated circuit PMIC supplies power to a subsystem of an electronic device based on a current state of a master finite state machine FSM executed by the master PMIC. A slave power management integrated circuit PMIC executes a slave finite state machine FSM and supplies power to another subsystem based on the current state of the master FSM. For synchronizing the operation of both PMIC, the master PMIC transmits, to the slave PMIC, synchronization information indicative of at least one of an input signal of the master FSM, a state of the master FSM, a state transition of the master FSM, and an output signal generated by the master FSM. A distributed power management method is presented which is carried out by a master PMIC and a slave PMIC.Type: GrantFiled: October 4, 2016Date of Patent: March 26, 2019Assignee: Dialog Semiconductor (UK) LimitedInventors: Olivier Girard, Daniele Giorgetti, Joao Paulo Trierveiler Martins, Philip Todd